Dodge ZB 2005 Service Manual page 1172

Symptom:
P0123-THROTTLE POSITION SENSOR #1 VOLTAGE TOO HIGH
When Monitored and Set Condition:
P0123-THROTTLE POSITION SENSOR #1 VOLTAGE TOO HIGH
When Monitored: With the ignition on and battery voltage above 10.4 volts.
Set Condition: Throttle Position Sensor signal voltage at the PCM goes above 4.5 volts for
3.2 seconds.
TP SENSOR SWEEP
INTERMITTENT CONDITION
TP SENSOR
(K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K22) TP SENSOR NO.1 SIGNAL CIRCUIT OPEN
(K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO (K7) 5-VOLT SUPPLY CIRCUIT
(K900) SENSOR GROUND CIRCUIT OPEN
PCM
TEST
1 Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
NOTE: Ensure the throttle is fully closed and free from binding or carbon
build up.
Start the engine.
With the DRBIII , read the Throttle Position Sensor voltage.
Is the voltage above 4.5 volts?
Yes → Go To 2
→ Go To 8
No
2 Turn the ignition off.
Disconnect the Throttle Position Sensor harness connector.
Connect a jumper wire between the (K22) TP Sensor No.1 Signal circuit and the
(K900) Sensor ground circuit.
Ignition on, engine not running.
With the DRBIII , monitor the TP Sensor voltage.
Is the voltage below 0.5 of a volt?
Yes → Replace the Throttle Position Sensor.
→ Go To 3
No
NOTE: Remove the jumper wire before continuing.
POSSIBLE CAUSES
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
51
APPLICABILITY
All
All